Transmission-Line Type Large Digital Spark Chambers

A transmission-line type digital spark chamber is described consisting of electrodes of etched wires on an "H" Film substrate, backed by a bonded metal foil. The foils are pulsed from one end and are terminated and connected to the wires at the other end. The chamber gives uniform response. The size of the spark was investigated for several HV pulse shapes and amplitudes. The efficiency is high even to multiple sparks because the spark impedance in gases with quenching vapors is high relative to the line impedance, and because of the strong coupling to the pulsed foils.